/*
 * Copyright 2023 Google LLC
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "src/image/SkImage_Base.h"

#include "include/core/SkBitmap.h"
#include "include/core/SkColorSpace.h"
#include "include/core/SkColorType.h"
#include "include/core/SkImage.h"
#include "include/core/SkImageInfo.h"
#include "include/core/SkMatrix.h"
#include "include/core/SkPixmap.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkSize.h"
#include "include/core/SkSurfaceProps.h"
#include "include/core/SkTypes.h"
#include "include/private/base/SkDebug.h"
#include "src/core/SkBitmapCache.h"
#include "src/core/SkColorSpacePriv.h"
#include "src/core/SkImageFilterCache.h"
#include "src/core/SkImageFilterTypes.h"
#include "src/core/SkImageFilter_Base.h"
#include "src/core/SkSpecialImage.h"
// #include "src/image/SkRescaleAndReadPixels.h"

#include <atomic>
#include <utility>

class SkImageFilter;

SkImage_Base::SkImage_Base(const SkImageInfo& info, uint32_t uniqueID)
        : SkImage(info, uniqueID), fAddedToRasterCache(false) {}

SkImage_Base::~SkImage_Base() {
    return;
//     if (fAddedToRasterCache.load()) {
//         SkNotifyBitmapGenIDIsStale(this->uniqueID());
//     }
}

void SkImage_Base::onAsyncRescaleAndReadPixels(const SkImageInfo& info,
                                               SkIRect origSrcRect,
                                               RescaleGamma rescaleGamma,
                                               RescaleMode rescaleMode,
                                               ReadPixelsCallback callback,
                                               ReadPixelsContext context) const {
    RENDER_UNIMPLEMENTED;
    return;
//     SkBitmap src;
//     SkPixmap peek;
//     SkIRect srcRect;
//     if (this->peekPixels(&peek)) {
//         src.installPixels(peek);
//         srcRect = origSrcRect;
//     } else {
//         // Context TODO: Elevate GrDirectContext requirement to public API.
//         auto dContext = as_IB(this)->directContext();
//         src.setInfo(this->imageInfo().makeDimensions(origSrcRect.size()));
//         src.allocPixels();
//         if (!this->readPixels(dContext, src.pixmap(), origSrcRect.x(), origSrcRect.y())) {
//             callback(context, nullptr);
//             return;
//         }
//         srcRect = SkIRect::MakeSize(src.dimensions());
//     }
//     return SkRescaleAndReadPixels(src, info, srcRect, rescaleGamma, rescaleMode, callback, context);
}

bool SkImage_Base::onAsLegacyBitmap(GrDirectContext* dContext, SkBitmap* bitmap) const {
    RENDER_UNIMPLEMENTED;
    return false;
//     // As the base-class, all we can do is make a copy (regardless of mode).
//     // Subclasses that want to be more optimal should override.
//     SkImageInfo info = fInfo.makeColorType(kN32_SkColorType).makeColorSpace(nullptr);
//     if (!bitmap->tryAllocPixels(info)) {
//         return false;
//     }
//
//     if (!this->readPixels(
//                 dContext, bitmap->info(), bitmap->getPixels(), bitmap->rowBytes(), 0, 0)) {
//         bitmap->reset();
//         return false;
//     }
//
//     bitmap->setImmutable();
//     return true;
}

sk_sp<SkImage> SkImage_Base::makeSubset(GrDirectContext* direct, const SkIRect& subset) const {
    RENDER_UNIMPLEMENTED;
    return nullptr;
//     if (subset.isEmpty()) {
//         return nullptr;
//     }
//
//     const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
//     if (!bounds.contains(subset)) {
//         return nullptr;
//     }
//
//     // optimization : return self if the subset == our bounds
//     if (bounds == subset) {
//         return sk_ref_sp(const_cast<SkImage_Base*>(this));
//     }
//
//     return this->onMakeSubset(direct, subset);
}

sk_sp<SkImage> SkImage_Base::makeSubset(skgpu::graphite::Recorder* recorder,
                                        const SkIRect& subset,
                                        RequiredProperties requiredProps) const {
    RENDER_UNIMPLEMENTED;
    return nullptr;
//     if (subset.isEmpty()) {
//         return nullptr;
//     }
//
//     const SkIRect bounds = SkIRect::MakeWH(this->width(), this->height());
//     if (!bounds.contains(subset)) {
//         return nullptr;
//     }
//
//     return this->onMakeSubset(recorder, subset, requiredProps);
}

sk_sp<SkImage> SkImage_Base::makeWithFilter(GrRecordingContext*,
                                            const SkImageFilter* filter,
                                            const SkIRect& subset,
                                            const SkIRect& clipBounds,
                                            SkIRect* outSubset,
                                            SkIPoint* offset) const {
    RENDER_UNIMPLEMENTED;
    return nullptr;
//     if (!filter || !outSubset || !offset || !this->bounds().contains(subset)) {
//         return nullptr;
//     }
//
//     auto srcSpecialImage = SkSpecialImage::MakeFromImage(
//             nullptr, subset, sk_ref_sp(const_cast<SkImage_Base*>(this)), SkSurfaceProps());
//     if (!srcSpecialImage) {
//         return nullptr;
//     }
//
//     sk_sp<SkImageFilterCache> cache(
//             SkImageFilterCache::Create(SkImageFilterCache::kDefaultTransientSize));
//
//     // The filters operate in the local space of the src image, where (0,0) corresponds to the
//     // subset's top left corner. But the clip bounds and any crop rects on the filters are in the
//     // original coordinate system, so configure the CTM to correct crop rects and explicitly adjust
//     // the clip bounds (since it is assumed to already be in image space).
//     // TODO: Once all image filters support it, we can just use the subset's top left corner as
//     // the source FilterResult's origin.
//     skif::ContextInfo ctxInfo = {
//             skif::Mapping(SkMatrix::Translate(-subset.x(), -subset.y())),
//             skif::LayerSpace<SkIRect>(clipBounds.makeOffset(-subset.topLeft())),
//             skif::FilterResult(srcSpecialImage),
//             fInfo.colorType(),
//             fInfo.colorSpace(),
//             /*fSurfaceProps=*/{},
//             cache.get()};
//     skif::Context context = skif::Context::MakeRaster(ctxInfo);
//
//     return this->filterSpecialImage(
//             context, as_IFB(filter), srcSpecialImage.get(), subset, clipBounds, outSubset, offset);
}

sk_sp<SkImage> SkImage_Base::filterSpecialImage(skif::Context context,
                                                const SkImageFilter_Base* filter,
                                                const SkSpecialImage* specialImage,
                                                const SkIRect& subset,
                                                const SkIRect& clipBounds,
                                                SkIRect* outSubset,
                                                SkIPoint* offset) const {
    RENDER_UNIMPLEMENTED;
    return nullptr;
//     sk_sp<SkSpecialImage> result = filter->filterImage(context).imageAndOffset(context, offset);
//     if (!result) {
//         return nullptr;
//     }
//
//     // The output image and offset are relative to the subset rectangle, so the offset needs to
//     // be shifted to put it in the correct spot with respect to the original coordinate system
//     offset->fX += subset.x();
//     offset->fY += subset.y();
//
//     // Final clip against the exact clipBounds (the clip provided in the context gets adjusted
//     // to account for pixel-moving filters so doesn't always exactly match when finished). The
//     // clipBounds are translated into the clippedDstRect coordinate space, including the
//     // result->subset() ensures that the result's image pixel origin does not affect results.
//     SkIRect dstRect = result->subset();
//     SkIRect clippedDstRect = dstRect;
//     if (!clippedDstRect.intersect(clipBounds.makeOffset(result->subset().topLeft() - *offset))) {
//         return nullptr;
//     }
//
//     // Adjust the geometric offset if the top-left corner moved as well
//     offset->fX += (clippedDstRect.x() - dstRect.x());
//     offset->fY += (clippedDstRect.y() - dstRect.y());
//     *outSubset = clippedDstRect;
//     return result->asImage();
}

void SkImage_Base::onAsyncRescaleAndReadPixelsYUV420(SkYUVColorSpace,
                                                     sk_sp<SkColorSpace> dstColorSpace,
                                                     SkIRect srcRect,
                                                     SkISize dstSize,
                                                     RescaleGamma,
                                                     RescaleMode,
                                                     ReadPixelsCallback callback,
                                                     ReadPixelsContext context) const {
    RENDER_UNIMPLEMENTED;
    return;
//     // TODO: Call non-YUV asyncRescaleAndReadPixels and then make our callback convert to YUV and
//     // call client's callback.
//     callback(context, nullptr);
}

sk_sp<SkImage> SkImage_Base::makeColorSpace(GrDirectContext* direct,
                                            sk_sp<SkColorSpace> target) const {
    return this->makeColorTypeAndColorSpace(direct, this->colorType(), std::move(target));
}

sk_sp<SkImage> SkImage_Base::makeColorSpace(skgpu::graphite::Recorder* recorder,
                                            sk_sp<SkColorSpace> target,
                                            RequiredProperties props) const {
    return this->makeColorTypeAndColorSpace(recorder, this->colorType(), std::move(target), props);
}

sk_sp<SkImage> SkImage_Base::makeColorTypeAndColorSpace(GrDirectContext* dContext,
                                                        SkColorType targetColorType,
                                                        sk_sp<SkColorSpace> targetCS) const {
    RENDER_UNIMPLEMENTED;
    return nullptr;
//     if (kUnknown_SkColorType == targetColorType || !targetCS) {
//         return nullptr;
//     }
//
//     SkColorType colorType = this->colorType();
//     SkColorSpace* colorSpace = this->colorSpace();
//     if (!colorSpace) {
//         colorSpace = sk_srgb_singleton();
//     }
//     if (colorType == targetColorType &&
//         (SkColorSpace::Equals(colorSpace, targetCS.get()) || this->isAlphaOnly())) {
//         return sk_ref_sp(const_cast<SkImage_Base*>(this));
//     }
//
//     return this->onMakeColorTypeAndColorSpace(targetColorType, std::move(targetCS), dContext);
}

sk_sp<SkImage> SkImage_Base::makeColorTypeAndColorSpace(skgpu::graphite::Recorder*,
                                                        SkColorType ct,
                                                        sk_sp<SkColorSpace> cs,
                                                        RequiredProperties) const {
    // Default to the ganesh version which should be backend agnostic if this
    // image is, for example, a raster backed image. The graphite subclass overrides
    // this method and things work correctly.
    return this->makeColorTypeAndColorSpace(nullptr, ct, std::move(cs));
}
